5% down for owner occupy while keeping current as rental?

[Justen Ashcraft]

I have several rental properties in my name.  My wife has our current residence in her name.  We've been looking to get a larger house for our growing family in the same neighborhood.  We have a local lender that has pre-approved us for our new residence with a down payment of only 5%.  We specified that we would be keeping our current property as a rental and she said that's fine.  As long as we have 5% down.  I asked her if that was going to pass underwriting, and she said that she had Already ran it through the computer and it passed.  Is this something that mortgage companies are able to do now with a shortage of buyers?  We were sure it was going to be between 10%-20% down.

thanka for any input.